dovecot-2.2.28-1.el6_31.wing.x86_64 I've created this public shared namespace with namespace public2 { type = public separator = . prefix = Public2. location = maildir:/mail/public2:INDEX=/mail/%u/public:LAYOUT=fs:DIRNAME=.store subscriptions = no } and I'm using the "imap_client_workarounds = tb-extra-mailbox-sep" and filesystem structure listed at the end. The problem is that with this configuration thunderbird (and roundcubemail) shows the Public2 namespace but empty - without any folders. I've tried with another DIRNAME=StoR - same effect If I will not use DIRNAME at all(and no .stor directories) TB sees the f1 f2 folders but not the f2/s1 subfolder. Just like it would not list any subfolders for subscription. Within TB I can create subfolder say f1/mysub1 but after it's unsubscribed cannot be subscribed again(not shown in listing) Can You provide any hints? I can live without the DIRNAME= but it has to list subfolders for subscription. BTW: it works well without LAYOUT=fs - but it's kind of requirement here. /mail/public2/: drwxrwsr-x 4 nobody havemail 4096 Apr 7 15:07 f1 drwxrwsr-x 3 nobody havemail 4096 Apr 7 15:02 f2 /mail/public2/f1: -rw-r--r-- 1 root havemail 42 Apr 7 15:07 dovecot-acl -r--r--r-- 1 nobody havemail 0 Oct 14 2015 dovecot-shared -rw-rw-r-- 1 nobody havemail 0 Oct 15 2015 dovecot-uidlist drwxrwsr-x 3 nobody havemail 4096 Apr 7 15:02 s1 drwxrws--- 5 nobody havemail 4096 Apr 7 15:02 .store /mail/public2/f1/s1: -rw-r--r-- 1 root havemail 40 Oct 16 2015 dovecot-acl -r--r--r-- 1 nobody havemail 0 Oct 14 2015 dovecot-shared -rw-rw-r-- 1 nobody havemail 0 Oct 15 2015 dovecot-uidlist drwxrws--- 5 nobody havemail 4096 Apr 7 15:02 .store /mail/public2/f1/s1/.store: drwxrws--- 2 nobody havemail 4096 Oct 15 2015 cur drwxrws--- 2 nobody havemail 4096 Oct 15 2015 new drwxrws--- 2 nobody havemail 4096 Oct 15 2015 tmp /mail/public2/f1/.store: drwxrws--- 2 nobody havemail 4096 Oct 15 2015 cur drwxrws--- 2 nobody havemail 4096 Oct 15 2015 new drwxrws--- 2 nobody havemail 4096 Oct 15 2015 tmp /mail/public2/f2: -rw-r--r-- 1 root havemail 40 Oct 16 2015 dovecot-acl -r--r--r-- 1 nobody havemail 0 Oct 14 2015 dovecot-shared -rw-rw-r-- 1 nobody havemail 0 Oct 15 2015 dovecot-uidlist drwxrws--- 5 nobody havemail 4096 Apr 7 15:02 .store /mail/public2/f2/.store: drwxrws--- 2 nobody havemail 4096 Oct 15 2015 cur drwxrws--- 2 nobody havemail 4096 Oct 15 2015 new drwxrws--- 2 nobody havemail 4096 Oct 15 2015 tmp